An optical information recording method in an optical recording generation method for performing recording and reproduction of information by radiating laser light which is pulse-modulated according to a recording waveform having a plurality of setting parameters onto a storage medium is disclosed. The method comprises reading information recorded in the storage medium; determining positions corresponding to a detection pattern from the detection pattern and a reproduction signal, the detection pattern being defined according to a specific parameter from among the plurality of setting parameters, and the reproduction signal being obtained by reading the information; detecting the state of the reproduction signal according to the result of the determination; generating an ideal reproduction signal according to the detection pattern; and obtaining a predetermined signal evaluation index value using the result of detection of the state of the reproduction signal and the ideal reproduction signal.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An optical information recording method in an optical recording regeneration method for performing recording and reproduction of information by radiating laser light which is pulse-modulated according to a recording waveform having a plurality of setting parameters onto an optical storage medium comprising: reading information recorded in the storage medium; determining positions corresponding to a detection pattern from the detection pattern and a reproduction signal, the detection pattern being defined according to a specific parameter from among the plurality of setting parameters, and the reproduction signal being obtained by reading the information; detecting the state of the reproduction signal according to the result of the determination; generating an ideal reproduction signal according to the detection pattern; and obtaining a predetermined signal evaluation index value using the result of detection of the state of the reproduction signal and the ideal reproduction signal.
2. The optical information recording method according to claim 1 , further comprising controlling the specific parameter using the evaluation index value.
3. The optical information recording method according to claim 2 , wherein the control of the specific parameter is achieved by changing the conditions of the specific parameter so that the evaluation index value becomes smaller.
4. The optical information recording method according to claim 2 , wherein control of the specific parameter is achieved by changing conditions of the specific parameter so that the evaluation index value satisfies a predetermined target level or a predetermined allowable range.
5. The optical information recording method according to claim 1 , wherein the specific parameter is a laser power intensity condition.
6. The optical information recording method according to claim 1 , wherein the specific parameter is a write pulse width condition.
7. The optical information recording method according to claim 1 , wherein the specific parameter is a start position and/or an end position of the laser radiation.
8. The optical information recording method according to claim 1 , wherein the reproduction signal is a digital signal obtained by sampling light returned from the storage medium at a predetermined frequency.
9. The optical information recording method according to claim 1 , wherein the reproduction signal is a signal obtained by applying a waveform equalizing process to the digital data obtained by sampling light returned from the storage medium at a predetermined frequency.
10. The optical information recording method according to claim 1 , wherein the detection pattern is a code pattern having one or more marks and space periods.
11. The optical information recording method according to claim 1 , wherein the determining of the positions corresponding to the detection pattern outputs a detection instruction signal as a result, and the detection instruction signal is a gate signal comprising the positions corresponding to the detection pattern.
12. The optical information recording method according to claim 1 , wherein the ideal reproduction signal is an ideal signal corresponding to the reproduction signal obtained when the mark and the space corresponding to the detection pattern are recorded accurately in the storage medium.
13. The optical information recording method according to claim 1 , wherein the signal evaluation index value is an evaluation index obtained by quantizing the amount of reference of the detection signal with respect to the ideal signal.
14. The optical information recording method according to claim 1 , wherein the signal evaluation index value is an evaluation index showing the possibility that the detection signal is recognized as a code pattern different from the one actually recorded.
15. A computer readable medium having stored therein a program for causing a circuit to perform the method according to claim 1 .
16. The medium according to claim 15 , wherein the medium is an optical information recording medium.
17. The medium according to claim 16 , wherein a target value and/or an allowable range of the signal evaluation index value is recorded in advance.
18. An optical information regeneration recorder in an optical recording reproduction device for performing recording and reproduction of information by radiating laser light which is pulse-modulated according to a recording waveform having a plurality of setting parameters onto a storage medium, the recorder comprising: an optical drive configured to read information recorded in the storage medium; a determining circuit configured to determine positions corresponding to a detection pattern from the detection pattern and a reproduction signal, the detection pattern being defined according to a specific parameter from among the plurality of setting parameters, and the reproduction signal being obtained by reading the information; a detecting circuit configured to detect the state of the reproduction signal according to the result of the determination; a generating circuit configured to generate an ideal reproduction signal according to the detection pattern; and a obtaining circuit configured to obtain a predetermined signal evaluation index value using the result of detection of the state of the reproduction signal and the ideal reproduction signal.
19. The optical information regeneration recorder according to claim 18 , further comprising a display configured to display at least one of a value obtained in a process of obtaining the evaluation index value, the recording conditions, the quality of the storage medium, and the result of processing.
20. The optical information regeneration recorder according to claim 18 , further comprising a storage device configured to store at least one of the recording reproduction setting condition used in a process of obtaining the evaluation index value, an obtained characteristic value, a calculated evaluation parameter value, the amount of laser power correction, storage medium positional information, temperature information, moisture information and the result of processing.
21. The optical information regeneration recorder according to claim 18 , further comprising a registering circuit configured to for register a target value and/or an allowable range of the signal evaluation index value in advance.
22. A signal processing circuit suitable for being integrated in an optical recording reproduction device for performing recording and reproduction of information by radiating laser light which is pulse-modulated according to a recording waveform having a plurality of setting parameters onto a storage medium, comprising: a reading device configured to read information recorded in the storage medium; a determining device configured to determine positions corresponding to a detection pattern from the detection pattern and a reproduction signal, the detection pattern being defined according to a specific parameter from among the plurality of setting parameters, and the reproduction signal being obtained by reading the information; a detecting device configured to detect the state of the reproduction signal according to the result of the determination; a generating device configured to generate an ideal reproduction signal according to the detection pattern; and a obtaining device configured to obtain a predetermined signal evaluation index value using the result of detection of the state of the reproduction signal and the ideal reproduction signal.
23. A system for performing recording and reproduction of information by radiating laser light which is pulse-modulated according to a recording waveform having a plurality of setting parameters onto a storage medium comprising: means that reads information recorded in the storage medium; means that determines positions corresponding to a detection pattern from the detection pattern and a reproduction signal, the detection pattern being defined according to a specific parameter from among the plurality of setting parameters, and the reproduction signal being obtained by reading the information; means that detects the state of the reproduction signal according to the result of the determination; means that generates an ideal reproduction signal according to the detection pattern; and means that obtains a predetermined signal evaluation index value using the result of detection of the state of the reproduction signal and the ideal reproduction signal.
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June 1, 2007
January 26, 2010
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